Added info about v21 to the README

[fballiano]

No description provided.

[addison74]

It was absolutely necessary to keep a list of the differences between the main and next branches. You have certainly kept records and you can check if there are others. Those who use OM must be prepared for changes in the future, I think that very few use the next branch in testing. This list will help them.

[fballiano]

github is doing it already https://github.com/OpenMage/magento-lts/pulls?q=is%3Apr+is%3Amerged+base%3Anext

[fballiano]

that point is now the only one in the entire readme that has a ".", it doesn't look good to me, that's why I preferred one sentence. I don't think we've to say to backup, still.

[addison74]

Often when things don't go well people tend to blame others. By mentioning to backup the files is the way to avoid further discussions.

[fballiano]

it's written everywhere to backup when updating. anyway. I still think it looks off to have only one dot in the lists, but ok

[addison74]

You can remove the last dot (after the "script" word) to keep the same format. All the others are fine.

[addison74]

Offtopic: #3146 - This merged PR should be in the main branch. It is a very useful feature. Moving a website to the next branch will involve effort. Jquery is 3.7 instead of 1.12, used in most existing extensions. this in addition to bringing extensions to PHP 8.2. Therefore, until the transition is made, certain PRs should be merged in the main branch, as is the one mentioned by me.

[fballiano]

this one is already on the main branch, #3146 is a breaking change and since the famous RFC we've to put breaking changes in the next branch :-)